Anybody ever connect an external battery?

[jmcgsd]

I don't exactly want to look like Jed on the Beverly Hillbillies, but I'm looking at cheap fixes to the power problem while I decide whether to keep both the TC and the trailer. If I sell the trailer then I'll spend some bucks upgrading the TC.

The other issue is recharging the battery or batteries in a reasonable time. I know I'll need to upgrade the old Magnatek with the PD replacement, but in the meantime I plan to use an external charger running off the genny to get he batteries back up in a reasonable amount of time.

I'm spoiled by my trailer. It has a massive 4D AGM battery and an auxiliary 30A Samlex charger to bring it up to capacity quickly.

I do want to do some cold weather boondocking with the TC however and that one group 27 with the Magnatek just won't hack it unless I run the generator all night.